Sifter



Feb. 23 1926.

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C. M. LIGHT ET AL SIFTER Filed Dec. 5, 1923 vPatented F eb. 23, 1926.

, UNITED STATES 1,573,979 Param* carries.

'CARCLYN M LIGHT, or Los ANGELES, CALIFoRnrA, ann LoUIsA ARCHER, 0F

, ROCHEsTER, New YORK.

SIFTER.

Application led December 3, 1923.

To all/whom t may concern:

l Be it known that CARoLrN4 MfLrCIrr and LoUIsA ARCI-inn, both citizensof the United States, and residing, respectively, at Los Angeles,California, and Rochester, New York, have invented certain new anduseful Improvements in Sifters, of which the followingis aspecification.'

This invention relates generally to sifters, and particularly to siftersfor household or domestic use, the primary object of the invention beingto provide a sifter which shall be of simple construction and thereforeof inexpensive manufacture, and yet which will prove thoroughlypractical and efficient in use.

A further object of the invention is to provide a sifter of suchconstruction and which operates in such manner that material passingthrough the sifter will be screened a number-of times at one and thesame operation.

-A further object is to provide a sifter of that typewherein a pluralityof screens are employed, characterized by a novel construction andassemblage of the casing and screens, as well as the agitator, whichenables the device to be easily assembled with simple operations, whichminimizes the opportunity for wear, breakage or dismemberment of theparts, which may be easily operated, which quickly performs itsscreening operations, which may be quickly and easily relieved offoreignmatter, such as Y dirt, grit, etc., and which will prove thorf oughlycapableof carrying forth its several operations.

IVith these objects in view, together with others which will appear asthe description proceeds, the invention consists in the novelconstruction, assemblage and arrangement of parts, all as will bedescribed more fully hereinafter, illustrated in the drawings, andparticularly pointed out in the claims.

' In the drawings; Y

Fig. l is a vertical sectional view taken through a sifter constructedin accordance "with the invention, and

Serial No. 678,156.

This barrel, which may be of any suitable height and diameter, isprovided at one side with a handle or grip sl. of conventionalconstruction; the ends of which are extended into suitable openings nearthe upper and lower ends of the cylinder, and secured therein as shown.

The interior of the barrel is divided into three chambers 5, 6 and 7,and these chambers are formed by arranging within the barrel the screens8, 9 and l0. These screens are formed of the usual sifter screen fabricor wire, and may be of the same size mesh, or the meshes of the severalscreens may be different, as desired. The screens are arranged parallelto each other and are securely held properly positioned within thebarrel. The upper screen 8 and the next underlying' or intermediatescreen 9 are held in place in the same manner. Each of thesel screens,circular in form as will be understood, is of slightly larger diameterthan the interior of the barrel, and rest at their edges upon theinwardly projecting annular ribs ll formed in the wall of the barrelatthe proper places. The extreme edge portions of these screens areturned up as shown, and are engaged by the expansible or spring ringsl2; the latter exerting pressure upon the 11p-turned portions of thescreens and tightly forcing the same into engagement with the innerwalls of the barrel and with the upper surfaces of the ribs ll.

The lower screen l0 is constructed similar to those above described,excepting that the extreme edge is turned down and is to be receivedwithin the pocket or recess formed by crimping the lower edge of thebarrel. This crimped portion, indicated at 13, tightly binds the lowerscreen in place and maintains the same in its proper position at alltimes.

Each of the screens 8, 9 and l0 is provided centrally with an openingfor the reception of the shaft of the agitator, and each of theseopenings may be provided with a ring to prevent fraying of the fabricandv to provide a suitable bearing for the said shaft. These rings areindicated at 14, and may be secured to the fabric in any suitable orapproved manner.

The agitator has its lower end protruding through the ring in the lowerend of the barrel and through a washer l5, and is enldeflected 4to form.acran'lr` arm .20, .to the lend larged or .flattened at its lowerextremity whereby the shaft is locked in positron against any upwardmovement. That porvtion of the shaft immediately above the screen 10 isdeflected laterally as at 16 vand is then rebent as at 17 to provide anagi- A tator portion of such length as to substantially reach from side'to side'of the barrel and tobe capable of sweeping the .entire uppersurface of the lower screen l0. The

shank-'or shaft thenextendsthrough the ring .ber -lfG-ilf, andisofsubstantially -the'sanie lengthas the latter' agitator. .Theagitator .arm 18 fis :then rebent upon itself `as shown,

.and passes upwardly ythrcughthe .ring in the tscreen 8, .whereupon itis bent so as vto provide a -double agitator arm .19 capable ofsweepingthe upper surface ofthe -top screen 8. From 'the extremity cfthis arm portion, the sha-nk extends to'fthe axis of the barrel and iscontinued upwardly and then of which isattachedazlrnob.21, for obviouspurposes. The upper part'of -the shank yor AYll() shaft is steadied in aybearing .formed in the central Epart of tlievcross brace i2. ln this.manner 'the shaft i-s securely held in vpesition Vin `the barrel andlcannot remove itself there-from, because of `the locking arrangementfat `the -under Yside yof the lower screen, and -because Vof the.nranner in which the several sweeper farms preventthe 'shaft movingdownwardly in the barrel.

VEach-of the-chambersh and 7 provided with. .means whereby 'the .sa-meimay be `relieved -of iany foreign mat-ter which may collect thereinorheggleaned fromthe -in-aterial being sift-ed.. The side wall ofthebarrel :adjacent -.-to each lof these chambers is provided with anopening 2?, closed by a Y plate or .gat-e241. rllhese openings arenormaterial passing through the .bottom screen Lis thoroughly freed ofgrit or other foreign matter and a high -degreeof I'fineness is assured.Any large particles trapped in the compartments 6 and V7 may be removed'break therefrom by simply opening t-he doors 24: and tilting .thesiffter slightly, 'while foreign matter that may have collected abovethe upper screen 8 maybe removed therefrom in lan obviousmanner.

v` vWith "a sifter constructed in accordance herewith, it is at onceapparent that the materials opeiated upon are, at a single operation,-given three different screenings, and separate operations to theaccomplishment of the sameiend are ebviated.. By constructing thescreens, "barrel and e-gitater in the `manner Yset Vforth it vis obviousithat simplicitiy in manufacturey and consequent ch'eapness of sale areassured `without "detracting from the .high'degree of -eliiciency thearticle attains.

lVhile the above is a description of -lt-he inventionin its preferredembodiment, lit is apparent that Vchanges in the details oflcon- I'struction of fthe several parts and 'the vassemblage of the same may beresorted to withoutdeparting lfrom the. spirit `'of the inventionYasdefined by the claims.

Having thus ldescribed vour invention, we claim l. In -a siftei, 'abarrel, a yplurality of screens arranged in spaced parallel relation insaid v.barrel Aand each. having -a central opening, a. shaft rotatablysupportedin said openings, the said shaft being bent v`u pon itselfabove each screen to provide a pa-irof spaced upper and lower armsextending radially of the screens, .the .upper arm rof each .pair .beingdisposeda. substantial distance below the `fscreen :above .the same ktobreak upV particles of material forced through said screen andto aeratesaid .inaterial, and the .lower .arms Alying closel .to their.respective screens .to .form `sweeps therefor .to force materialthrough said screens. .A

2. In a sifter, a barrel, a plurality of screens arranged .in spacedparallel relation in saidbarrel and each .having a .central opening, ashaft'lrotatably.supported in said openings, the said shaft being bent:upon itself above each screen ftoiprovidea .pair of spaced upper andlower arms extending radially .of .the screens, the upper .arm of each.pair being disposeda substantial distance below the screen .above the`same to up particles of .material forced through said-screenand tovaerate saidmain nearer proximity to the lower .screens than to thenearest adjacent upper screens,

and the Vlower arm-s lying close .to `their respective screens toformsweeps therefor to force material through said screens.

In testimony whereof We AaiiiX "our signatureshere'to.

eaa'oLYN M. LIGHT. `LouisaL ARCHER.

